Air Regulator

FILLING CiCLE

Figure 28 Pressure-filling system illustrating the propellant-filler unit in filling position.

FILLING CiCLE

Figure 28 Pressure-filling system illustrating the propellant-filler unit in filling position.

Figure 29 Stepped rotary machines for large-scale manufacturing.

According to the desired production output capacity, two main types of machines can be selected: stepped rotary and continuous rotary.

Stepped Rotary Machines

On the stepped rotary machines, the maximum output is related directly to the type of valve used. Effectively, when using a metered valve, such as those used for bronchodilator aerosols, you should not expect an output production of more than 35-40 cans/min. A stepped rotary machine is shown schematically in Fig. 29. With other valves, designed for fast filling, output capacity can reach 60-70 cans/min. Figure 29 shows how to calculate the time required per container.

Continuous Rotary Machines

Continuous rotary machines, unlike the stepped rotary machines, do not perform concentrate filling, crimping, and propellent charging on the same indexing unit. Each operation in the aerosol packaging process is carried out on a different continuous rotary station. As a result, high production output capacity is obtained (100-200 containers/min). Figure 30 shows a continuous rotary machine.

Figure 30 Continuous rotary machines for large-scale manufacturing.

It is of prime importance to pinpoint the total production expected before investing in manufacturing facilities. When significant production is required, it would be appropriate to select a continuous rotary system rather than multiple stepped rotary machines.

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